Ana Rodríguez-Villa Lario1,2, Juan Ferrando3, Óscar M Moreno-Arrones4,5, Alba Gómez-Zubiaur1,2. 1. Department of Dermatology, Príncipe de Asturias University Hospital, University of Alcalá, Madrid, Spain. 2. Trichology Unit, Instituto Médico Ricart., Madrid, Spain. 3. Department of Dermatology, Hospital Clinic, Universitat de Barcelona, Barcelona, Spain. 4. Dermatology Department, Trichology Unit, Ramon y Cajal University Hospital, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), University of Alcalá., Madrid, Spain. 5. Trichology and Hair Transplantation Unit, Grupo Pedro Jaen Clinic., Madrid, Spain.
Abstract
INTRODUCTION: Brauer nevus, also known as congenital triangular alopecia (CTA) is a localized alopecia that rarely affects the occipital or mid-frontal region. CTA is a localized follicular hypoplasia, commonly misdiagnosed as alopecia areata. Although named congenital, onset in adulthood is possible. CASE PRESENTATION: We present a review of literature of eighteen atypical locations, providing 4 new cases to the 9 previously published, with particular attention to trichoscopy and histopathological descriptions in this exceptional presentation forms. DISCUSSION: Occipital and mid-frontal Brauer nevus are unusual findings with very few cases reported so far. Because of its rarity and atypical presentation, it can often lead to a misdiagnosis. A higher incidence in the male sex stands clear in these locations. Detection at birth is slightly more frequent than in the classical CTA. Histopathological and trichoscopy findings do not differ from the classical entity, although white or hypopigmented hairs do not seem to be an item present in the mid-frontal forms.
INTRODUCTION: Brauer nevus, also known as congenital triangular alopecia (CTA) is a localized alopecia that rarely affects the occipital or mid-frontal region. CTA is a localized follicular hypoplasia, commonly misdiagnosed as alopecia areata. Although named congenital, onset in adulthood is possible. CASE PRESENTATION: We present a review of literature of eighteen atypical locations, providing 4 new cases to the 9 previously published, with particular attention to trichoscopy and histopathological descriptions in this exceptional presentation forms. DISCUSSION: Occipital and mid-frontal Brauer nevus are unusual findings with very few cases reported so far. Because of its rarity and atypical presentation, it can often lead to a misdiagnosis. A higher incidence in the male sex stands clear in these locations. Detection at birth is slightly more frequent than in the classical CTA. Histopathological and trichoscopy findings do not differ from the classical entity, although white or hypopigmented hairs do not seem to be an item present in the mid-frontal forms.
Authors: Pablo Fernández-Crehuet; Sergio Vaño-Galván; Antonio Martorell-Calatayud; Salvador Arias-Santiago; Ramón Grimalt; Francisco M Camacho-Martínez Journal: J Am Acad Dermatol Date: 2016-09 Impact factor: 11.527